Status and development of lithium ion battery recycling by hydrometallurgical technology

It is a key task of the national 14th Five Year Plan for the development of circular economy, to improve the recycling level of waste power batteries, which is of great significance for ensuring national energy and resource security. At present, the recycling rate of the waste ternary lithium batteries is less than 22.5%, and Li recovery rate is less than 75%. Ni, Co, Mn recovery rate can be above 98.5%, but there are problems such as poor consistency of the obtained powder material, large amount use of acid and alkali, long technological process, and high production cost, and so on. In this paper, the technical status and problems of hydrometallurgical technology for the waste ternary lithium are introduced, based on which the concentration and enrichment technology of Li in the process are analyzed, and the research progress of the selective lithium extraction technologies are overviewed including the advantages and disadvantages. Research on the selective leaching of lithium, and the development of lithium extraction technology are key common technologies and key research directions, which are of great significance for improving resource utilization capacity.